Commit Graph
221 Commits
Author SHA1 Message Date
Richard SmithandGeoff Romer 1ec8ac7ef9 Add Copy interface and use it for making copies. (#6034)
Instead of hardcoding which types are copyable, add a `Core.Copy`
interface to perform copying. Move almost all the current copy support
to that interface. Some remaining pieces are still using builtin logic
after this PR:

* For tuples and structs, builtin logic is used to perform elementwise
copies. This also supports copying *adapters of* tuples and structs,
which seems like it may not be desirable, especially for non-extending
adapters. A `Copy` impl is provided for tuples of at most 2 elements, so
that `Core.Copy` constraints are satisfied, but we can't implement this
generally until we have variadics support, and don't yet have a
mechanism to generalize this to structs.
* For `enum` types imported from C++, builtin logic is used to perform a
copy. This is temporary until we have a mechanism to identify these
types from an impl in the prelude.

One lowering test in `toolchain/lower/testdata/class/generic.carbon` is
disabled for now, as it causes a crash in the lowering code due to an
ABI mismatch between the call signature in the lowered declaration of a
specific function and the call that is generated in the specific callee.
Fixing this is a little involved, and will be done in a separate PR.

---------

Co-authored-by: Geoff Romer <gromer@google.com>
2025-09-10 23:55:55 +00:00
Richard Smith e8cd229e74 When performing an impl lookup, only import impls for related interfaces. (#6040)
This avoids impl lookups involving, say, `Core.Int` pulling in all ~65
impls in "prelude/types/int", which resulted in a lot of unnecessary
importing work, followed by a lot of unnecessary inst namer and inst
formatter work.

Before:
```
Ran 1335 tests in 6186 ms wall time, 146818 ms across threads
  Slowest tests:
  - toolchain/check/testdata/interop/cpp/function/arithmetic_types_bridged.carbon: 5611 ms, 5532 ms in Run
  - toolchain/check/testdata/interop/cpp/function/operators.carbon: 2034 ms, 1981 ms in Run
  - toolchain/check/testdata/primitives/import_symbolic.carbon: 1796 ms, 1786 ms in Run
  - toolchain/lower/testdata/operators/arithmetic.carbon: 1729 ms, 1728 ms in Run
  - toolchain/lower/testdata/function/generic/call_recursive_sccs_deep.carbon: 1700 ms, 1697 ms in Run
[==========] 1335 tests from 1 test suite ran. (682 ms total)
```

After:
```
Ran 1335 tests in 2419 ms wall time, 109587 ms across threads
  Slowest tests:
  - toolchain/check/testdata/interop/cpp/function/arithmetic_types_bridged.carbon: 1748 ms, 1665 ms in Run
  - toolchain/check/testdata/interop/cpp/function/operators.carbon: 1106 ms, 1057 ms in Run
  - toolchain/lower/testdata/function/generic/call_recursive_diamond.carbon: 1044 ms, 1041 ms in Run
  - toolchain/lower/testdata/function/generic/call_recursive_sccs_deep.carbon: 1015 ms, 1012 ms in Run
  - toolchain/lower/testdata/operators/arithmetic.carbon: 998 ms, 997 ms in Run
[==========] 1335 tests from 1 test suite ran. (652 ms total)
```

That's still slower than it should be, but a large improvement
nonetheless.

Fixes #6029
2025-09-10 21:40:27 +00:00
Dana Jansens ed43fd2c1c Give the BindSymbolicName for .Self in a binding pattern a FacetType type (#6036)
If it's just `TypeType` then the `BindSymbolicName` appears directly in
type positions, but if it is replaced with another facet value, then we
would need to insert a `FacetAccessType` around it. By giving it a
`FacetType` type, like other `BindSymbolicName`s we make it consistent
and avoid having to introduce extra instructions.
2025-09-10 17:57:08 +00:00
Jon Ross-Perkins 0518fdebbc Fix potential fingerprint conflict in constraints (#6033)
This uses each vector's size as a barrier between lists, to eliminate
the possibility of incidental collisions between entries of different
lists. This is the same as is done inside `AddBlock`.
2025-09-09 21:44:03 +00:00
Richard Smith 50e5476ee3 Add support for unsafe as operator to the toolchain. (#5993)
Following the direction of #5913, add support for parsing an `unsafe as`
operator. For now, we allow one additional conversion using `unsafe as`
beyond the conversions supported by `as`: we permit pointer conversions
that remove qualifiers, such as `const T*` -> `T*`.
2025-08-28 23:00:53 +00:00
Richard Smith 2352e93bb5 Remove now-unused StringType instruction. (#5964) 2025-08-20 18:30:11 +00:00
Dana JansensandJon Ross-Perkins 4b0e2b03b6 Add the .Self name for the type expression of a compile time binding (#5937)
We add a virtual node (`CompileTimeBindingPatternStart`) as the first
child of `CompileTimeBindingPattern` which holds the identifier
underneath it, so that it is checked just before the type expression of
the `CompileTimeBindingPattern`. When we reach this virtual node during
check, we add `.Self` as a name in the current scope, and when we reach
`CompileTimeBindingPattern` we remove it from scope, which ensures it's
present during only the checking of the type expression for the compile
time pattern.

At the moment the `.Self` has a different type (it's a `TypeType`) than
other `.Self` in the facet type (which are a single `FacetType`), but
the intention is to immediately substitute it out of the facet type
entirely, replacing it with a reference to the compile time binding (a
`BindSymbolicName`) itself. A TODO has been added for this.

---------

Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
2025-08-12 16:27:07 +00:00
Jon Ross-Perkins b410ebd088 Fix destruction of generic types (#5943)
The self access is important; for the test `generic_class.carbon` being
added to `toolchain/check/testdata/class/destroy_calls.carbon`, it was
using `%T.as.Destroy` instead of `%D.as.Destroy`, indicating the default
blank impl was being used instead of the type-specific version. That
test is trying to focus on the issue, but the delta is visible in a
couple other files in this PR, for example
`toolchain/check/testdata/class/generic/init.carbon`.

I'm separately working on getting rid of the default impl, which is how
I noticed this.
2025-08-12 00:10:43 +00:00
Jon Ross-Perkins 55085de6aa Use GetStructType when building object repr structs (#5923)
I was thinking about this for destruction, which I may not be able to
use it for, but still think this may be a good change to keep features
consistent.
2025-08-06 23:55:05 +00:00
37d5046ceb Support parse/check/lower for char (#5901)
toolchain/check/testdata/builtins/char/basics.carbon and
toolchain/lower/testdata/builtins/char.carbon are probably the most
interesting tests here. The parse tests is required because this adds a
new node kind, and we need coverage of it; but the attached info is
minor. There's a fair amount of test churn here because I'm adding the
Core.Char and Core.CharLiteral types as new singletons.

My intent here is that `CharId` is always a unicode code point, even
when the type is a `Char` and thus must be a single UTF-8 code unit
(single byte). This mainly means the stored value of a `CharValue` can
be printed internally without knowing the type.

---------

Co-authored-by: josh11b <15258583+josh11b@users.noreply.github.com>
Co-authored-by: Richard Smith <richard@metafoo.co.uk>
2025-08-06 20:39:01 +00:00
Jon Ross-PerkinsandGeoff Romer 7209ad7c9f Generate Destroy impls for classes (#5873)
Although this focused on `Destroy` support, some choices here around
`implicit_type_impls` are because copy/move will likely follow a similar
approach. I'm trying not to predict too much about how we'll structure
those, but I'm putting `Destroy` impl logic in a file that could perhaps
be shared with those. They'd likely be interested in similar things,
e.g. traversing members of types (particularly class, struct literal,
tuple literal).

At present this sets the destroy function as `no_op` which is consistent
with current logic, but has a TODO to correctly define.

Constant importing for functions changes slightly due to some issues I
was having with `GetFunctionType`. zygoloid suggested this approach to
avoid `EvalInst` logic.

Adds a flag for controlling whether to generating these impls. While
this does generation for `class`, as noted above this'll also need to be
done for tuples and struct literals, which would leave the `none.carbon`
min_prelude unable to use any types. Note if destruction *would* occur,
it'll still look up `Core.Destroy` for that and fail, but that's already
true of any test using `none.carbon`. I'm trying to use the flag to see
if we can keep `none.carbon` working mostly-consistently.

I'd tried separating out the flag to #5852, but that got a lot of
pushback over whether the behavior was appropriate. I'm hoping that the
interactions here make it clearer why the particular approach -- the
goal is not to enable advanced testing, or create some new end-user
behavior that we really support, it's just to keep no-prelude tests
functional. The main question raised there was why not just keep
generating `impl T as Core.Destroy` if `fn destroy` is present -- but I
think here it should be apparent that would require additional
complexity, as the generation of `impl T as Core.Destroy` is not
currently conditioned based on the implementation of `fn destroy`. I'd
rather add complexity to this flag only if it's enabling interesting
test functionality.

---------

Co-authored-by: Geoff Romer <gromer@google.com>
2025-08-04 19:39:22 +00:00
Jon Ross-Perkins 7ccc1e0144 Expand naming for impls and functions (#5808)
Change impls from `<interface>.impl` to `<self>.as.<interface>.impl`,
and *member* functions to `<parent scope>.<fn>` (non-member functions
exclude their parent scope). Stop special-casing builtin functions,
given the new naming scheme.

The purpose of this is to make it clearer when a member function is
being accessed and, if so, which member function. In particular, we
often access interface `Op` functions. The builtin function
special-casing was intended to help with that, but we still have lots of
`Op` functions. This particular approach should make the interactions
clearer.

This changes up queueing of block IDs a little because, in particular,
we need to process bodies of entities only after constants finish
processing. But, it should also result in less memory usage during
processing because it means we have less on the insts stack at any given
time, since we track a block rather than all instructions contained by
the block.
2025-07-21 18:45:07 +00:00
Jon Ross-PerkinsandGeoff Romer eae3491129 Switch inst namer to queue entities when reached (#5806)
This switches from the `CollectNamesInBlock` approach for entities, to
instead traversing entities as they're encountered. For example, when
traversing constants, when a type is found, the entity will have its
block queued for processing.

This leads to a change in the traversal order, which affects
disambiguation done by numeric sequencing (since that's just showing the
traversal order).

This will allow for simpler "name based on name" logic. This is
something I plan to use for:

- impls: `<type>.as.<interface>.impl`
- functions: `<entity>.<member function>`
  - Note an impl may be used as the entity for a bound function.

By naming the entities as they're encountered, I'll be able to rely on
the generated names rather than recalculating them.

To assist this, I'm also differentiating between the ambiguous and
disambiguated name. Otherwise, we could end up with things like
`<function>.<disambiguator>.<call>.<other disambiguator>`, where the
repeated disambiguator may not be necessary in order to get full
disambiguation. It's also a smaller delta from the current output.

Note, changing `Name` to a class felt appropriate given its shape. I was
also noticing that parts of its API were unused, and the class helps
detect unused private members.

---------

Co-authored-by: Geoff Romer <gromer@google.com>
2025-07-21 17:58:55 +00:00
Jon Ross-Perkins 8cd1307711 Include the interface name in impl names (#5798)
i.e., `impl` -> `<interface>.impl`
2025-07-11 19:52:53 +00:00
Jon Ross-Perkins e855f38b8c Tag destruction as desugaring (#5790)
In `BuildUnaryOperator`, `GetOperatorOpFunction` is treated as
desugaring, but `PerformCompoundMemberAccess` and `PerformCall` are not.
This treats all of destruction as desugaring.

This leads to some instructions being elided, because of `GetOrAddInst`
behaviors:

> // If the instruction has a desugared location and a constant value,
returns
> // the constant value's instruction ID. Otherwise, same as AddInst.

This changes instructions that previously had a non-desugared location
to instead have a desugared location, so if they also have a constant
value then the constant value can be used directly.
2025-07-10 21:21:19 +00:00
Jon Ross-Perkins 4aa62bf5cd Switch Destroy to addr self (#5748)
Pointed out by zygoloid on #toolchain, just taking care of this now.
2025-06-28 00:50:47 +00:00
Jon Ross-Perkins 0722dab0ef Reimplement destroy as an interface (#5678)
This changes `Destroy` to use an interface for its implementation.

Note that this change includes a lot of test updates. Even when
`Destroy` is a no-op, it still causes code generation as part of
determining that.

Originally I was trying to use ranges to cut down the scope of this, and
to a degree I think they have. But a flipside here is that cases where
no destructors should be generated -- particularly globals -- would be
needed to completely remove destructor calls. Even for ranges, the range
can often include the destructor placement. So I've shifted
frame-of-thought a little: accept a bunch of destructor churn, because
destructors are needed and will be prevalent. The verbosity is a feature
of the design to make desugaring apparent in IR, not a bug.
2025-06-27 21:57:14 +00:00
Jon Ross-Perkins 70c94cb5b4 Clean up --no-prelude-import uses (#5722)
For some of these, it's just replacing with min_prelude/none.carbon.
Some had min_preludes specified, and I'm generally switching those to
none.carbon as well. The one exception is the destroy.carbon test, which
I noticed because of #5678
2025-06-25 21:03:15 +00:00
Dana Jansens 07aec169e1 Add min-preludes to more slow tests (#5681)
Adds min-preludes more tests which were seen as slow and their
surrounding neighbours. This drops the file_test runtime on my machine
from about 7s to about 6s.

For a few files that are clearly only testing diagnostics, we drop the
if-present semir ranges and the associated TODO.
2025-06-17 20:55:48 +00:00
Dana Jansens e09419bfd4 Make more tests into min-prelude (#5676)
This drops the wall clock time for running file_test from 10s to 8s on
my machine. There's many more tests to convert, as each one takes the
test from ~1s to ~100ms. Compiling the full prelude is a bit slow now
since #5653, and before that file_test was taking about 3.5s.

We introduce a few more flavours of min_prelude to support more tests.
2025-06-17 19:25:57 +00:00
Richard SmithandGeoff Romer 80529aaef9 Convert the scrutinee of a binding pattern to the right category. (#5662)
When the binding pattern appears within a `var` pattern, convert to a
reference. Otherwise, convert to a value.

This gets the advent of code examples to produce the right answers again
:)

---------

Co-authored-by: Geoff Romer <gromer@google.com>
2025-06-17 16:45:19 +00:00
Richard Smith 344f0b7550 Support for heterogeneous operators. (#5653)
Replace the binary `Operation` interfaces with the `OperationWith(T:!
type)` interfaces described in the design, and add a `Result` associated
type for both unary and binary operations. Update the `impl`s in the
prelude for integer types to use the new form, including supporting
implicit conversion of either operand.

I've tried to split this PR up into commits focused on distinct changes
for review convenience. It may be simplest to review it one commit at a
time.
2025-06-13 01:55:24 +00:00
Jon Ross-Perkins 04d534abee Remove the no_prelude directory, using --no-prelude-import directly (#5607)
People seemed receptive [on
#toolchain](https://discord.com/channels/655572317891461132/655578254970716160/1379196447827689553),
so proceeding.

For the two name conflicts, I've set it up so that there's a
"foo.carbon" and "foo_with_prelude.carbon", to indicate that the
no-prelude approach is preferred (with a shorter name).

Note min_prelude will require a little more work/thought, I want to
avoid adding `--custom-core` etc.
2025-06-04 16:56:03 +00:00
a23631f360 Support for lowering references to imported vars. (#5513)
Previously we walked the global variables defined by the current file
and emitted an LLVM global variable definition for each of them. Now
instead, when emitting a constant reference to a global variable, we
emit an LLVM global variable declaration, and we then subsequently walk
the global variables defined by the current file and convert each of
them from a declaration to a definition.

In order to make import of names of global variables work, add support
for import of `var`, as well as support for importing `tuple_access` and
`tuple_pattern` in the case where the `var` has a tuple pattern in its
declaration. Also treat `bind_name`s that are reference bindings to
`var`s as having the same constant reference value as their `var` so
that we can properly import and lower them.

---------

Co-authored-by: Jon Ross-Perkins <jperkins@google.com>
Co-authored-by: Carbon Infra Bot <carbon-external-infra@google.com>
2025-05-29 19:48:16 +00:00
Jon Ross-Perkins 0b8fa690cd Add range flag settings to let files (#5565)
Where `--no-dump-sem-ir` is used, change to `--dump-sem-ir-ranges=only`.
Otherwise, add `--dump-sem-ir-ranges=if-present` with a TODO to change
to `only`.

Note, SemIR is affected just because the extra comments change line
numbers in files where splits aren't in use.
2025-05-29 18:35:15 +00:00
Richard Smith 5b884ae14d Improve lowering for global variables. (#5492)
- Track the `VarPattern` instruction on the `VarStorage` instruction so
that it's available for name mangling.
- Mangle global variables based on the first binding name within their
pattern.
- Give global variables external rather than internal linkage, except if
they have no bindings whatsoever in their pattern.
- To support lowering references to bindings nested within a global var,
such as for `var (x: i32, b: i32)`, add some basic initial support for
reference constant expressions. Treat a global `var` as a reference
constant, and treat an aggregate access into a reference constant as a
reference constant.
2025-05-21 00:09:10 +00:00
Geoff RomerandRichard Smith fbc5994750 Support importing var parameters (#5400)
This restructures the import and merge logic to support parameter
patterns in a more scalable way.

---------

Co-authored-by: Richard Smith <richard@metafoo.co.uk>
2025-05-19 22:50:16 +00:00
Richard Smith 797b14eb8e Import ImplWitnessTable into the imports block instead of the constants block. (#5374)
Don't import `ImplWitnessTable` into the `constants` block, because we
generally don't put `Unique` constants there. This matches the handling
of the other kinds of `Unique` constants. In order to keep the
instruction visible in formatted SemIR, add it to the `imports` block
instead.

Also fix a bug in the instruction formatter that resulted in
instructions in the `imports` block being omitted from the output if
they were only referenced by earlier instructions in the `imports` block
and by instructions in the `constants` block. This was already resulting
in some referenced instructions being omitted from the output, but also
occurred frequently for `impl_witness_table` instructions after this
change because it is common for the only reference to those instructions
to be from `impl_witness` instructions in the `constants` block.
2025-05-01 00:08:43 +00:00
Geoff Romer 34887403ab Model patterns as constant values (#5385)
This will enable us to simplify support for parameter and return
patterns in import, which operates primarily on constants.
2025-04-30 22:32:41 +00:00
Geoff Romer 7c85397f8b Stop treating symbolic binding patterns as constants (#5361)
This was originally needed to support constant evaluation of name
expressions, but that's now done in a different way.

This is actually a step toward treating all patterns as constants. The
upcoming change will do so in a slightly different way, and so it will
simplify the review to start from a baseline where patterns are never
constant.
2025-04-28 23:45:15 +00:00
Geoff Romer fafb655d39 Separate pattern types from expression types (#5360)
This is a step toward treating patterns as compile-time constants, so
that we can import them more easily.
2025-04-28 16:54:37 +00:00
51498547c9 Always use LookupImplWitness instructions for symbolic witnesses (#5321)
We eliminate the `FacetAccessWitness` instruction, which would sometimes
immediately evaluate to a concrete `ImplWitness`, and sometimes remain
symbolic. This instruction is now replaced by `LookupImplWitness` in all
cases. To support the same use cases, when it is evaluated,
`LookupImplWitness` will look in the self value if it's a facet value,
and attempt to return a concrete `ImplWitness` from it before looking
for an `impl` statement.

The `LookupImplWitness` instruction's value is now canonical, even when
it evaluates to a symbolic `LookupImplWitness` instruction, by
canonicalizing the self value of the lookup query. This canonicalization
unwraps `FacetAccessType` and `FacetValue` instructions to get to an
underlying canonical facet value. However we must preserve and use the
non-canonical query while evaluating the instruction in order to look
for a concrete `ImplWitness` if the query self value was a concrete
`FacetValue`. The canonicalization ensures that symbolic witnesses
obtained from a facet value are compatible with those obtained from an
impl statement, as long as the self types originate from the same
canonical facet value though they may have been narrowed.

Member access now unconditionally does a `LookupImplWitness()`
operation, instead of only sometimes doing the lookup for a final impl
declaration.

`EvalImplLookupResult` is marked `[[nodiscard]]` so that we don't
construct it and forget to return it. This was a mistake made at one
point during the creation of this PR. And the `has_concrete_value()`
method no longer has a precondition that `has_value()` is true, since we
want to look for a concrete result only in the new use of
`EvalImplLookupResult` returned from lookup into the query self facet
value.

The TODO from `FacetAccessWitness` evaluation is addressed by ensuring
the index of the witness in the `FacetValue` comes from the required
interfaces of the `FacetValue`'s type, and that the type (a `FacetType`)
is the same facet type used in the query to construct the `FacetValue`'s
witness block. This is made possible by eliminating the
`FacetAccessWitness` indirection. The lookup into a `FacetValue` happens
while evaluating `LookupImplWitness` and it does so directly on the self
value. This gives a consistent view of the witness set and the facet
type, as they both come from the same instruction.

All of this with 400 less lines of code. :)

---------

Co-authored-by: josh11b <15258583+josh11b@users.noreply.github.com>
Co-authored-by: Richard Smith <richard@metafoo.co.uk>
2025-04-23 16:39:09 +00:00
Richard Smith ca8df34d0d Format the call parameters of a function, not the patterns. (#5342)
This makes the parameters printed in a SemIR `fn` declaration match the
arguments printed in a SemIR `call` instruction.
2025-04-22 18:52:21 +00:00
Richard Smith 64baa84e4d Stop substituting into MetaInstId operands. (#5328)
A `MetaInstId` is intended to represent a handle to an instruction in a
generic as an operand to a template action; substituting into the action
should not substitute into the referenced instruction.

Fixing this exposed a bug in `GetOrAddInst` where it would return an
`InstId` of an unattached symbolic constant in some cases, rather than
the `InstId` of an instruction that has the relevant (attached) constant
value. That's fixed for now by turning off the `GetOrAddInst`
optimization in that case, but in future we can refine this by adding
the instruction to the eval block for the generic only, and not to the
body of the generic.
2025-04-21 21:19:14 +00:00
Dana JansensandRichard Smith 0e8d354567 Split the witness table into a separate ImplWitnessTable instruction (#5272)
This allows us to import the table for a given impl only once, while we
can import many ImplWitness instructions with different specifics for a
generic impl.

For example in convert_facet_value_to_narrowed_facet_type.carbon we see
that a single witness table is imported for the BitAnd interface, with
multiple witnesses (for different specifics) imported and sharing the
same table.

The ImplWitnessTable now contains a back-link to the Impl the witness is
for, allowing inst namer to name that interface in the textual semir,
and allowing the interface to be found when debugging from a witness.

---------

Co-authored-by: Richard Smith <richard@metafoo.co.uk>
2025-04-11 20:30:04 +00:00
Richard Smith a74ca9071b Remove all remaining uses of TypeIds as instruction operands. (#5280)
In preparation for shifting from `TypeId`s potentially representing
attached types to always representing unattached types, using
[terminology suggested on
Discord](https://discord.com/channels/655572317891461132/963846118964350976/1359286326779973712).
This change causes us to track slightly more type spelling information
through SemIR.

One change that has significant impact on the SemIR output is that we
now build a `struct_type` instruction in each class representing the
types of the fields, including the spelling used for those types. This
is now no longer always identical to the corresponding canonical
`struct_type` for the object representation, so it's built separately
and owned by the class.

Also remove `TypeBlock` support entirely, as its only use was
representing `TupleType`s, which now use an `InstBlock`.
2025-04-10 20:53:42 +00:00
Dana Jansens d07f70cfb3 Add insts for witness table entries that are unset or associated constants (#5255)
Instead of using None, use an explicit ImplWitnessTablePlaceholder in
the witness table for entries that have not yet been populated, to aid
debugging. This would ensure they would show up very clearly in the
SemIR. This uncovered some `<invalid>` in the SemIR under erroneous
conditions that have now been turned into `<error>`.

Add the ImplWitnessAssociatedConstant instruction which wraps the
canonical instruction found from the constant value of the rewrite
constraint. This ensures that we have an instruction inside the eval
block for a generic impl declaration for each rewrite constraint's
value, which allows Subst to be performed to rewrite the symbolic
constant of the ImplWitnessAssociatedConstant instruction to associate
it with the generic. This will prevent the otherwise orphaned symbolic
constant of the rewrite's value from being used which can not have a
specific applied to them.

While applying the new insts in InitialFacetTypeImplWitness(), rearrange
the function to use less nesting. And avoid using entity names from
imported instructions (as we found is not effective in deduce.cpp) and
use a local instruction by going through the constant value.

This PR is part of the effort to allow a rewrite to name a generic
parameter, such as `impl forall [T:! type] T as Z where .X = T`, however
tests for this involve a final impl so that we can typecheck that the .X
value is a specific T, so the tests will come with that work. This piece
is split off because introducing new instructions causes a lot of SemIR
churn, and I wanted to get that done separately.
2025-04-08 19:10:49 +00:00
Richard Smith a45dc42d82 Store an InterfaceId and a SpecificId in AssociatedEntityType. (#5252)
Instead of storing a `TypeId` that always refer to a facet type that
always contains exactly a single interface, store the interface
directly.

Also improve stringification of `LookupImplWitness` and witness access
into it, switching to using newly-added functionality for stringifying
specific interfaces.
2025-04-05 16:08:09 +00:00
Richard SmithandDana Jansens bba32900c3 Preserve type sugar in ArrayType, ConstType, and PointerType. (#5235)
Each of these types takes another type as an operand. Instead of storing
that other type as a `TypeId`, store it as an `InstId` so that we can
track how it was written, not only its canonical form.

The canonical constant values of these types continue to store the
canonical constant values of their operands, as normal.

---------

Co-authored-by: Dana Jansens <danakj@orodu.net>
2025-04-03 21:14:03 +00:00
Richard Smith 265968b396 Make evaluation of symbolic bindings simpler and more uniform (#5215)
Factor out logic to evaluate `EntityNameId` instead of duplicating it
between `BindSymbolicName` and `SymbolicBindingPattern`. Remove support
in `SymbolicBindingPattern` for evaluating a pattern to the constant
value of the corresponding binding, which doesn't really make any sense
given that patterns don't generally evaluate to the value that they
matched.

This results in the handling for `SymbolicBindingPattern` being simply
the default handling for an always-constant instruction, so remove the
special case for it entirely and change its constant kind to `Always`.
It's not entirely clear that it makes sense for `SymbolicBindingPattern`
to be treated as a constant when other patterns aren't, but we seem to
be relying on this in various places, so leave it as a constant for now.
Changing it to never be constant will be a smaller change now -- it just
requires changing the `constant_kind`.

The IR changes in the tests are fairly widespread, but mechanical, and
there are two kinds of things changing:

- `symbolic_binding_pattern`s in specifics now evaluate to
`symbolic_binding_pattern`s, not to the argument values. This means in a
few cases we end up with additional `symbolic_binding_pattern`
constants.
- We evaluate the type operand of `symbolic_binding_pattern` now, so an
error in the type will now properly be propagated into an error in the
pattern's constant value.
2025-04-01 20:24:00 +00:00
josh11bandJosh L 384be1dbe3 Change conversion diagnostic from saying "value" to "expression" (#5221)
Avoids TODO to make the message change based on the expression category.

Co-authored-by: Josh L <josh11b@users.noreply.github.com>
2025-03-31 15:45:58 +00:00
Richard Smith 4acc9cac5d Replace GetInstForSpecific with direct support for rendering a SpecificId in diagnostics. (#5192)
Avoids misbehavior caused by GetInstForSpecific's side effects, such as
recursively reentering constant evaluation.
2025-03-26 22:53:32 +00:00
Richard Smith 584426dfa2 Initial work on support for templates (#5081)
This broadly follows the design described in [this design
document](https://docs.google.com/document/d/1eWW8MTko3PIqxZ32-GhsdaRSYqoDicxMB1VeessMTOg/edit?pli=1&tab=t.0).

Support is provided for only two primitives for now -- simple member
access and type conversion -- to demonstrate the basics of the
functionality.
2025-03-19 20:19:21 +00:00
Dana Jansens 417b3833e2 Produce helpful diagnostics when converting to a facet fails (#5109)
When converting to a facet there are three different failure modes:

1. You provided a non-type value. Only types can convert to facets. So
we tell you that we found a non-type value.
2. You provided a facet type (which has type TypeType) which does not
have witnesses for the the target facet's type. So we tell you that the
type `T` implements `X` but needs to implement `Y`.
2. You provided a (non-facet-type) concrete type (of type TypeType)
which does not implement the target facet's type (which is a FacetType).
So we tell you that we need the type to implement the FacetType but it
does not.
3. You provided a FacetAccessType (which is of type TypeType also, but
we special case this), whose underlying FacetType is not compatible with
the target facet's type. So we tell you that we need the type to
implement `X` but found a FacetAccessType `T` which implements `Y`.

Closes #5027
2025-03-14 15:50:03 +00:00
josh11bandJosh L ebaf62efb9 Associated constants can be used in member function signatures (#5089)
This required allowing incomplete facet types where previously
completeness was required. Once we support named constraints, we will
need a way to consistently go from an interface to a facet type witness
index without requiring the interface to be complete in these cases.

---------

Co-authored-by: Josh L <josh11b@users.noreply.github.com>
2025-03-12 00:33:46 +00:00
Dana Jansensandjosh11b 4539114c21 Return a set of ImplWitnesses from impl lookup (#5075)
A query facet type may contain multiple required interfaces, in which
case impl lookup should return an ImplWitness for an impl that is used
for each interface in the query. We bundle these together into an
instruction block and return that from impl lookup. The witnesses are in
the same order as the interfaces in the
`CompleteFacetType::required_interfaces`. This allows walking the
`required_interfaces` to find an interface to give an index that can
also be used to grab a witness from this set, or from FacetValue.

FacetValue now has an InstBlockId for the set of witnesses of the
FacetType, instead of a single ImplWitness instruction id.

FacetAccessWitness includes the index of the witness (determined from
the position in `required_interfaces`) of the witness it's accessing
from the FacetType.

The
toolchain/check/testdata/facet/no_prelude/fail_todo_call_combined_impl_witness.carbon
test demonstrates the fix in the resulting SemIR. We can see the calls
to methods on a multi-interface FacetType result in a FacetAccessWitness
with an index of the correct interface, and this results in a witness
that leads to the correct impl's function.

There is a TODO in member access, where it does not have a
`CompleteFacetType` yet, so it uses the index in
`FacetTypeInfo::impls_constraints` instead, but this can be incorrect in
the presence of named constraints, which when completed can add more
interfaces to the `CompleteFacetType` and which are sorted into an
arbitrary order with the rest there.

---------

Co-authored-by: josh11b <15258583+josh11b@users.noreply.github.com>
2025-03-10 16:00:35 +00:00
Alina Sbirlea 7fd54eded0 Reverse nesting of BoundMethod and SpecificFunction. (#5079)
During SemIR, when identifying a specific in a specific context, we'd
have to either look through a specific or through a bound method.
Canonicalize which one to look through first, by having the BoundMethod
created around a SpecificFunction instead.
This changes a lot of check tests.

TODO: As the SemIr does not currently allow removal (access to insts()
is intentionally const), the bound instruction created prior to finding
the specific is not removed from the instructions.
Options: (1) leave as is, (2) add a way to remove the previous bound,
(3) rethink how/when the BoundMethod inst is created.
2025-03-08 01:34:06 +00:00
Geoff Romer f08e046d9e Update text representation of CallParamIndex to match new name (#5067) 2025-03-04 23:28:42 +00:00
Geoff Romer d264f14027 Clean up handling of Call params (#5061)
- Explicitly document that `*Param` and `*ParamPattern` insts represent
`Call` parameters.
- Stop wrapping compile-time parameter patterns in `ValueParamPattern`
insts (because they aren't `Call` parameters).
- Document how `MatchContext::results_` relates to the `Call`
parameters, and be more consistent about when it's written to.
- Remove `RuntimeParamIndex::Unknown`: we no longer need to distinguish
"this `Param`'s runtime index is unknown" from "this `Param` isn't a
runtime param", because we no longer use `Param`s at all in the latter
case.
- Rename `RuntimeParamIndex` to `CallParamIndex`.

As a side effect of removing the `ValueParamPattern` insts, this fixes a
minor diagnostic bug where `NoteInitializingParam` didn't identify the
specific parameter that led to a deduction failure, because it expects
generic parameters to only be represented by `SymbolicBindingPattern`s,
but before this change they could be wrapped in `ValueParamPattern`s.
2025-03-04 21:01:59 +00:00
josh11bandJosh L 900052fcf1 Clarify conversion diagnostic (#5052)
TODO to resolve whether it should conditionally say "object of"
depending on the category

---------

Co-authored-by: Josh L <josh11b@users.noreply.github.com>
2025-03-03 22:09:48 +00:00